import React, { useState } from 'react';

class Example extends React.Component {

    constructor(props) {
        super(props);
        this.state = {
            count: 0,
        }
    }
    render() {
        return (
            <div>
                <p> you click {this.state.count} times</p>
                <button onClick={() => this.setState({ count: this.state.count + 1 })}>
                    Click
                </button>
            </div>
        )
    }
}